JP2001214940A - Sealing member, roller bearing, and thin-type motor - Google Patents
Sealing member, roller bearing, and thin-type motorInfo
- Publication number
- JP2001214940A JP2001214940A JP2000024371A JP2000024371A JP2001214940A JP 2001214940 A JP2001214940 A JP 2001214940A JP 2000024371 A JP2000024371 A JP 2000024371A JP 2000024371 A JP2000024371 A JP 2000024371A JP 2001214940 A JP2001214940 A JP 2001214940A
- Authority
- JP
- Japan
- Prior art keywords
- rolling bearing
- ring
- rolling
- film
- seal member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Rolling Contact Bearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明に係るシール部材と
転がり軸受と薄型モータのうち、シール部材は、転がり
軸受を構成する転動体を設置した空間部分の端部開口を
塞ぐ為に利用する。又、上記転がり軸受は、各種機械装
置の回転支持部を構成する為に利用する。更に、上記薄
型モータは、例えばハードディスクドライブ装置（ＨＤ
Ｄ）、フレキシブルディスクドライブ装置（ＦＤＤ）等
の磁気ディスクドライブ装置を構成するディスク駆動用
モータ、ＩＣの冷却ファン駆動用モータ、レーザービー
ムプリンタ（ＬＢＰ）のポリゴンミラー駆動用モータ
等、各種機器の回転駆動用モータとして利用する。BACKGROUND OF THE INVENTION Among the seal member, the rolling bearing and the thin motor according to the present invention, the seal member is used for closing an end opening of a space where a rolling element constituting a rolling bearing is installed. In addition, the above-mentioned rolling bearing is used for constituting a rotation supporting portion of various mechanical devices. Further, the thin motor is, for example, a hard disk drive (HD)
D), rotation of various devices such as a disk drive motor constituting a magnetic disk drive such as a flexible disk drive (FDD), a motor for driving a cooling fan of an IC, and a motor for driving a polygon mirror of a laser beam printer (LBP). Used as a drive motor.
【０００２】[0002]
【従来の技術】例えば、コンピュータ等の記憶装置とし
て使用するＨＤＤの使用時にハードディスクは、ダイレ
クトドライブ型のスピンドルモータにより高速で回転駆
動する。この様なスピンドルモータの回転支持部を構成
する転がり軸受の、転動体を設置した空間部分には、潤
滑用のグリースを封入して、複数個の転動体と、内輪、
外輪両軌道との転がり接触部を潤滑している。更に、こ
れら複数個の転動体を設置した空間の両端開口部は、シ
ール板やシールド板等のシール部材により塞いでいる。
これにより、上記グリースが上記転動体を設置した空間
部分から外部に漏洩するのを防止すると共に、塵芥や水
分等の異物がこの空間部分に進入するのを防止してい
る。2. Description of the Related Art For example, when an HDD used as a storage device of a computer or the like is used, the hard disk is rotated at a high speed by a direct drive type spindle motor. Grease for lubrication is sealed in the space where the rolling elements are installed in the rolling bearings constituting the rotation supporting portion of such a spindle motor, and a plurality of rolling elements, an inner ring,
Lubrication of the rolling contact parts between the outer ring raceways. Further, the openings at both ends of the space in which the plurality of rolling elements are installed are closed by seal members such as a seal plate and a shield plate.
This prevents the grease from leaking to the outside from the space where the rolling elements are installed, and prevents foreign substances such as dust and moisture from entering the space.
【０００３】[0003]
【発明が解決しようとする課題】ＨＤＤ等を収めたケー
シング内部の省スペース化を図る為に、上述の様なスピ
ンドルモータとして、軸方向寸法を小さくした薄型モー
タを使用する事が行なわれている。この様な薄型モータ
を造る場合には、この薄型モータの回転支持部として組
み込む転がり軸受の軸方向寸法も小さくする必要があ
る。この様に転がり軸受の軸方向寸法を小さくする為に
は、この転がり軸受を構成する外輪及び内輪の軸方向寸
法を小さくする必要がある。一方、上記複数個の転動体
の直径若しくは軸方向寸法は、上記転がり軸受の軸受荷
重を確保する面から、あまり小さくできない。この為、
この様な事情を考慮して上記転がり軸受の軸方向寸法を
小さくすると、上記外輪及び内輪の軸方向端面と上記複
数個の転動体の転動面若しくは軸方向端縁との軸方向に
関する距離が短くなる。この結果、上記外輪の端部内周
面若しくは上記内輪の端部外周面に、上記シール部材を
係止する為の係止溝等を設ける事が難しくなったり、或
は、この係止溝を設けた場合でも、上記各転動体が邪魔
をして、上記係止溝に上記シール部材を係止する事が難
しくなる場合がある。本発明は、この様な事情に鑑み
て、転がり軸受の軸方向寸法を十分に小さくした場合で
も、上記シール部材を容易に組み付ける事ができる構造
を実現すべく発明したものである。In order to save space inside a casing containing an HDD or the like, a thin motor having a reduced axial dimension has been used as the spindle motor as described above. . When such a thin motor is manufactured, it is necessary to reduce the axial dimension of a rolling bearing incorporated as a rotation support portion of the thin motor. In order to reduce the axial dimension of the rolling bearing in this way, it is necessary to reduce the axial dimension of the outer ring and the inner ring constituting the rolling bearing. On the other hand, the diameter or the axial dimension of the plurality of rolling elements cannot be too small from the viewpoint of securing the bearing load of the rolling bearing. Because of this,
In consideration of such circumstances, when the axial dimension of the rolling bearing is reduced, the axial distance between the axial end surfaces of the outer ring and the inner ring and the rolling surfaces or the axial edges of the plurality of rolling elements increases. Be shorter. As a result, it is difficult to provide a locking groove or the like for locking the seal member on the inner peripheral surface of the end of the outer race or the outer peripheral surface of the end of the inner race. Even in such a case, there is a case where each of the rolling elements obstructs and it is difficult to lock the seal member in the locking groove. In view of such circumstances, the present invention has been made to realize a structure in which the seal member can be easily assembled even when the axial dimension of the rolling bearing is sufficiently reduced.
【０００４】[0004]
【課題を解決するための手段】本発明のシール部材と転
がり軸受と薄型モータのうち、請求項１に記載したシー
ル部材は、転がり軸受を構成する外輪の内周面と内輪の
外周面との間に存在する複数個の転動体を設置した空間
の端部開口のうちの少なくとも一部を塞いだ状態で、上
記外輪と上記内輪とのうちの一方の軌道輪に固定する。
特に、請求項１に記載したシール部材に於いては、フイ
ルム状の芯材の少なくとも一方の側面にアルミニウム若
しくはアルミナ製の皮膜を形成したフイルム材を、上記
端部開口の少なくとも一部を塞ぐ形状として成り、その
片側面の一部を上記一方の軌道輪の軸方向端面に接着固
定した状態で使用される。According to the present invention, among the seal member, the rolling bearing, and the thin motor according to the present invention, the seal member according to the first aspect of the present invention is provided with a seal member having an inner peripheral surface of an outer ring and an outer peripheral surface of an inner ring. It is fixed to one of the outer ring and the inner ring while at least a part of an end opening of a space in which a plurality of rolling elements existing between them is installed is closed.
In particular, in the seal member according to the first aspect, a film material in which a film made of aluminum or alumina is formed on at least one side surface of a film-shaped core material is used to close at least a part of the end opening. It is used in a state where a part of one side surface is adhered and fixed to the axial end surface of the one bearing ring.
【０００５】尚、上記フイルム材としては、例えば、ポ
リプロピレンフイルム、ポリエチレンフイルム、ポリエ
ステルフイルム等の芯材の少なくとも一方の（好ましく
は両方の）側面に、アルミニウム若しくはアルミナ（酸
化アルミニウム）の、蒸着膜或はコーティング膜を形成
したものを使用できる。As the film material, for example, a vapor-deposited film of aluminum or alumina (aluminum oxide) is formed on at least one (preferably both) side surfaces of a core material such as a polypropylene film, a polyethylene film and a polyester film. Can be used after forming a coating film.
【０００６】又、請求項２に記載した転がり軸受は、内
周面に外輪軌道を有する外輪と、外周面に内輪軌道を有
する内輪と、これら外輪軌道と内輪軌道との間に設けた
複数個の転動体と、上記外輪の内周面と上記内輪の外周
面との間で上記複数個の転動体を設置した空間の端部開
口を塞ぐシール部材とを備える。特に、請求項２に記載
した転がり軸受に於いては、上記シール部材が請求項１
に記載したシール部材であり、このシール部材の片側面
の一部を、上記外輪と上記内輪とのうちの一方の軌道輪
の軸方向端面に接着固定している。A rolling bearing according to a second aspect of the present invention provides an outer race having an outer raceway on an inner peripheral surface, an inner race having an inner raceway on an outer peripheral surface, and a plurality of races provided between the outer raceway and the inner raceway. And a seal member for closing an end opening of a space in which the plurality of rolling elements are installed between the inner peripheral surface of the outer race and the outer peripheral surface of the inner race. In particular, in the rolling bearing according to the second aspect, the sealing member is the first aspect.
And a part of one side surface of the seal member is bonded and fixed to an axial end surface of one of the outer races and the inner race.
【０００７】尚、請求項２に記載した転がり軸受を、次
述する薄型モータに組み込んで実施する場合に、好まし
くは、上記複数個の転動体をそれぞれ玉とすると共に、
これら各玉の直径を上記外輪及び内輪の軸方向寸法の
０．６倍以上にする事と、これら各玉の直径を２mm以下
にする事との、少なくとも一方を採用する。In a case where the rolling bearing according to the second aspect is incorporated in a thin motor as described below, the plurality of rolling elements are preferably formed as balls.
At least one of making the diameter of each ball 0.6 times or more the axial dimension of the outer ring and the inner ring, and making the diameter of each ball 2 mm or less is adopted.
【０００８】又、請求項３に記載した薄型モータは、ス
テータを支持固定した第一の部材と、このステータに対
向させたロータを支持固定した第二の部材とを、転がり
軸受により互いに相対回転自在に組み合わせて成り、上
記ロータの外径寸法が、モータ全体としての軸方向寸法
の７倍以上である。特に、請求項３に記載した薄型モー
タに於いては、上記転がり軸受が請求項２に記載した転
がり軸受である。尚、請求項３に記載した薄型モータを
実施する場合に、好ましくは、この薄型モータの軸方向
寸法を５mm以下とする。According to a third aspect of the present invention, in the thin motor, the first member supporting and fixing the stator and the second member supporting and fixing the rotor opposed to the stator are relatively rotated by a rolling bearing. The outer diameter of the rotor is at least seven times the axial dimension of the motor as a whole. In particular, in the thin motor according to the third aspect, the rolling bearing is the rolling bearing according to the second aspect. When implementing the thin motor described in claim 3, preferably, the axial dimension of the thin motor is 5 mm or less.
【０００９】[0009]
【作用】上述の様に構成する本発明のシール部材と転が
り軸受と薄型モータの場合、シール部材を転がり軸受に
組み付ける際には、このシール部材の片側面の一部を、
転がり軸受を構成する外輪と内輪とのうちの一方の軌道
輪の軸方向端面に接着固定する。従って、転がり軸受の
軸方向寸法を小さくする事に伴い、上記外輪及び内輪の
軸方向端面と複数個の転動体の転動面との軸方向に関す
る距離が短くなった場合でも、上記転がり軸受に対して
上記シール部材を容易に組み付ける事ができる。尚、本
発明の場合、シール部材は、厚さ寸法が極く小さいフイ
ルム材により形成している。この為、上述の様にシール
部材を一方の軌道輪の軸方向端面に固定した場合でも、
上記転がり軸受、並びにこの転がり軸受を組み込んだ薄
型モータの軸方向寸法が嵩む事はない。In the case of the seal member, the rolling bearing and the thin motor of the present invention configured as described above, when assembling the seal member to the rolling bearing, a part of one side surface of the seal member is removed.
One of the outer race and the inner race constituting the rolling bearing is bonded and fixed to the axial end face of the race. Therefore, even if the axial distance between the axial end faces of the outer ring and the inner ring and the rolling surfaces of the plurality of rolling elements is reduced with the reduction of the axial dimension of the rolling bearing, On the other hand, the seal member can be easily assembled. In the case of the present invention, the seal member is formed of a film material having an extremely small thickness. Therefore, even when the seal member is fixed to the axial end face of one of the races as described above,
The axial dimension of the rolling bearing and the thin motor incorporating the rolling bearing does not increase.
【００１０】又、本発明のシール部材を構成する、フイ
ルム状の芯材の少なくとも一方の側面に、アルミニウム
若しくはアルミナ製の皮膜を形成したフイルム材は、ガ
スバリア性等の異物遮断性能が良好であると共に、熱、
湿度、更には経時による性能変化が非常に小さい。この
為、転がり軸受を構成する転動体設置部の防錆や、この
転動体設置部内に封入したグリースの劣化防止等に関し
て、良好なシール性能を得られると共に、この良好なシ
ール性能を長期間に亙り維持できる。更に、上記シール
部材を上記一方の軌道輪の軸方向端面に接着固定する為
の接着剤として、粘着性を有するものを使用した場合で
も、この接着剤が乾燥する事を有効に防止できる為、こ
の接着剤の粘着力（接着力）を長期間に亙り維持でき
る。[0010] A film material having a film made of aluminum or alumina formed on at least one side surface of a film-shaped core material constituting the seal member of the present invention has good foreign matter blocking performance such as gas barrier properties. With heat,
The performance change with humidity and further over time is very small. For this reason, good sealing performance can be obtained with respect to rust prevention of the rolling element installation part constituting the rolling bearing and prevention of deterioration of grease sealed in the rolling element installation part, and this good sealing performance can be obtained for a long time. Can be maintained throughout. Furthermore, even if an adhesive having an adhesive property is used as an adhesive for adhesively fixing the seal member to the axial end face of the one raceway, the adhesive can be effectively prevented from drying. The adhesive strength (adhesive strength) of this adhesive can be maintained for a long period of time.
【００１１】[0011]
【発明の実施の形態】図１〜５は、本発明の実施の形態
の第１例を示している。本例の薄型モータ１は、全体を
略円輪状に形成した固定部材（ハウジング＝第一の部
材）２の内径側に回転軸（第二の部材）３を、１対の転
がり軸受４、４により回転自在に支持している。又、こ
の回転軸３の一端部（図１〜２の上端部）で上方（上下
は図面により、実際の使用状態を規制するものではな
い。本明細書全体で同じ。）の転がり軸受４から突出し
た部分に、全体を略円輪状に形成した回転部材（ハブ＝
第二の部材）５を、外嵌固定している。そして、上記固
定部材２の上面の内径側部分に固定したステータ６の外
周面と、上記回転部材５の下面の外径側部分に固定した
ロータ７の内周面とを、直径方向に亙り対向させてい
る。本例の場合、この様に構成する薄型モータ１の軸方
向寸法Ｈを５mm以下にすると共に、上記ロータ７の外径
寸法Ｄを、この薄型モータ１の軸方向寸法Ｈの７倍以上
（Ｄ≧７Ｈ）としている。1 to 5 show a first embodiment of the present invention. In the thin motor 1 of the present embodiment, a rotating shaft (second member) 3 is provided on a radially inner side of a fixed member (housing = first member) 2 having a substantially annular shape as a whole, and a pair of rolling bearings 4, 4. It is rotatably supported by. In addition, from one end (the upper end in FIGS. 1 and 2) of the rotating shaft 3, an upper part (upper and lower parts do not regulate the actual use state according to the drawing. The same applies throughout the present specification). On the protruding part, a rotating member (hub =
The second member 5 is externally fitted and fixed. The outer peripheral surface of the stator 6 fixed to the inner diameter side portion of the upper surface of the fixing member 2 and the inner peripheral surface of the rotor 7 fixed to the outer diameter side portion of the lower surface of the rotating member 5 face each other in the diametrical direction. Let me. In the case of the present example, the axial dimension H of the thin motor 1 thus configured is set to 5 mm or less, and the outer diameter D of the rotor 7 is set to be at least 7 times the axial dimension H of the thin motor 1 (D ≧ 7H).
【００１２】又、上記薄型モータ１を構成する１対の転
がり軸受４、４は、互いに隣接して背面組み合わせで配
置する事により、複列転がり軸受１５を構成している。
これら１対の転がり軸受４、４はそれぞれ、内周面に深
溝型の外輪軌道８を有する外輪９と、外周面に深溝型の
内輪軌道１０を有する内輪１１と、これら外輪軌道８と
内輪軌道１０との間に転動自在に設けた複数個の玉（転
動体）１２、１２とから成る。図示の組み付け状態で上
記１対の転がり軸受４、４を構成する外輪９、９は、そ
れぞれ上記固定部材２に、締り嵌め或は接着により内嵌
固定すると共に、これら両外輪９、９同士の間に円輪状
のスぺーサ１３を挟持している。尚、この様に両外輪
９、９同士の間にスぺーサ１３を挟持した状態で、上記
１対の転がり軸受４、４を構成する内輪１１、１１の互
いに対向する端面同士の間には、隙間が形成される。A pair of rolling bearings 4 constituting the thin motor 1 are arranged adjacent to each other in a back-to-back manner to form a double row rolling bearing 15.
Each of the pair of rolling bearings 4, 4 has an outer ring 9 having a deep groove type outer raceway 8 on an inner peripheral surface, an inner race 11 having a deep groove type inner raceway 10 on an outer peripheral surface, and these outer raceways 8 and the inner raceway. 10 and a plurality of balls (rolling elements) 12, 12 which are provided so as to be able to roll freely. In the assembled state shown in the drawing, the outer races 9, 9 constituting the pair of rolling bearings 4, 4 are fixedly fitted or fixed to the fixing member 2 by interference fitting or bonding, respectively. An annular spacer 13 is sandwiched between the spacers. In the state where the spacer 13 is sandwiched between the outer rings 9 and 9 in this manner, between the opposed end faces of the inner rings 11 and 11 constituting the pair of rolling bearings 4 and 4, respectively. A gap is formed.
【００１３】一方、上記各内輪１１、１１は、互いに近
づき合う方向に押圧した状態で、上記回転軸３の他端側
（図１〜２の下端側）部分に、締り嵌め或は接着により
外嵌固定している。この状態で、上記各玉１２、１２に
は、所定の予圧が付与される。又、この状態で、上記各
内輪１１、１１の外端面（互いに対向しない側の端面）
が、上記各外輪９、９の外端面（同じく互いに対向しな
い側の端面）よりも、それぞれ上記複列転がり軸受１５
の幅方向（図１の上下方向）中央側に位置する様に、各
部の寸法を規制している。更に、上記回転軸３の他端面
は、下方の内輪１１の外端面と同一平面上に配置してい
る。尚、本例の場合、上記各玉１２、１２の直径ｄを２
mm以下にすると共に、これら各玉１２、１２の直径ｄ
が、上記外輪９及び内輪１１の軸方向寸法Ｗの０．６倍
以上でこの寸法Ｗ未満（Ｗ＞ｄ≧０．６Ｗ）になる様
に、各部の寸法を規制して、上記各転がり軸受４、４の
軸方向の小型化を図っている。尚、上記直径ｄ及び軸方
向寸法Ｗは、前述した様に、薄型モータ１の軸方向寸法
Ｈを５mm以下にする事を考慮して、設計的に定める。On the other hand, the inner rings 11, 11 are pressed against each other in a direction approaching each other, and are fitted to the other end side (lower end side in FIGS. 1 and 2) of the rotary shaft 3 by tight fitting or bonding. It is fitted and fixed. In this state, a predetermined preload is applied to each of the balls 12, 12. In this state, the outer end surfaces of the inner rings 11, 11 (end surfaces not facing each other).
However, the double-row rolling bearings 15 are respectively larger than the outer end faces of the outer rings 9 and 9 (the end faces on the sides that are not opposed to each other).
The dimensions of each part are regulated so as to be located at the center in the width direction (vertical direction in FIG. 1). Further, the other end surface of the rotating shaft 3 is arranged on the same plane as the outer end surface of the lower inner ring 11. In the case of this example, the diameter d of each of the balls 12, 12 is 2
mm or less, and the diameter d of each of these balls 12, 12
However, the size of each part is regulated so that the axial dimension W of the outer ring 9 and the inner ring 11 is 0.6 times or more and less than the dimension W (W> d ≧ 0.6 W). 4 and 4 are downsized in the axial direction. As described above, the diameter d and the axial dimension W are determined by design in consideration of setting the axial dimension H of the thin motor 1 to 5 mm or less.
【００１４】又、上述の様な１対の転がり軸受４、４に
より構成する複列転がり軸受１５のうち、上記複数個の
玉１２、１２を設置した空間の両端開口部は、それぞれ
シール部材１４ａ、１４ｂにより塞いでいる。本例の場
合、これら両シール部材１４ａ、１４ｂは、ポリプロピ
レンフイルム、ポリエチレンフイルム、ポリエステルフ
イルム等の芯材１６の少なくとも一方の側面（図示の例
では、両側面）に、アルミニウム若しくはアルミナの蒸
着膜（皮膜）１７、１７を設けて成る、フイルム材１９
により構成している。In the double row rolling bearing 15 composed of the pair of rolling bearings 4 and 4 as described above, the openings at both ends of the space in which the plurality of balls 12 and 12 are installed are respectively sealed with sealing members 14a. , 14b. In the case of this example, these two sealing members 14a and 14b are formed by depositing aluminum or alumina vapor-deposited films (both sides in the illustrated example) on at least one side surface (both side surfaces in the illustrated example) of a core material 16 such as a polypropylene film, a polyethylene film, or a polyester film. A film material 19 comprising a film 17 and 17
It consists of.
【００１５】即ち、上記両シール部材１４ａ、１４ｂの
うち、上記空間の下端開口を塞ぐシール部材１４ａは、
上記フイルム材１９により、円形に形成している。この
様なシール部材１４ａは、その片側面（図１〜２の上側
面）の外周縁部分を下方の外輪９の外端面（図１〜２の
下端面）に接着固定した状態で、上記空間の下端開口を
塞いでいる。尚、前述した様に、下方の内輪１１の外端
面及び回転軸３の他端面は、上記下方の外輪９の外端面
よりも、前記複列転がり軸受１５の幅方向に関して中央
側に位置する。この為、上述の様に固定したシール部材
１４ａの片側面内径側部分が、上記下方の内輪１１の外
端面及び上記回転軸３の他端面と干渉する事はない。
又、本例の場合、上記シール部材１４ａの接着固定を行
なう為の接着剤１８は、予め、このシール部材１４ａの
片側面の外周縁部分で、上記下方の外輪９の外端面と対
向する部分（図３の斜格子で示した部分）に塗布してい
る。但し、上記接着剤１８は、上記シール部材１４ａの
片側面に塗布する代わりに、上記下方の外輪９の外端面
に塗布しておいても良い。That is, of the two seal members 14a and 14b, the seal member 14a for closing the lower end opening of the space is
The film 19 is formed in a circular shape. Such a sealing member 14a has the above-mentioned space in a state where the outer peripheral edge portion of one side surface (the upper side surface in FIGS. 1 and 2) is bonded and fixed to the outer end surface (the lower end surface in FIGS. The lower end opening is closed. As described above, the outer end surface of the lower inner ring 11 and the other end surface of the rotating shaft 3 are located closer to the center in the width direction of the double-row rolling bearing 15 than the outer end surface of the lower outer ring 9. Therefore, the inner diameter side portion of one side of the seal member 14a fixed as described above does not interfere with the outer end surface of the lower inner ring 11 and the other end surface of the rotating shaft 3.
In the case of the present example, the adhesive 18 for bonding and fixing the seal member 14a is provided in advance at a portion of the outer peripheral edge of one side surface of the seal member 14a facing the outer end surface of the lower outer ring 9. (The portion indicated by the oblique lattice in FIG. 3). However, the adhesive 18 may be applied to the outer end surface of the lower outer ring 9 instead of being applied to one side surface of the seal member 14a.
【００１６】一方、上記空間の上端開口を塞ぐシール部
材１４ｂは、上記フイルム材１９により、円輪状に形成
している。この様なシール部材１４ｂも、その片側面
（図１〜２の下側面）の外周縁部分を上方の外輪９の外
端面（図１〜２の上端面）に接着固定した状態で、上記
空間の上端開口を塞いでいる。又、この状態で、上記シ
ール部材１４ｂの内径側部分を、上記上方の内輪１１の
外径側部分に、軸方向に亙り重畳させている。尚、前述
した様に、上記上方の内輪１１の外端面も、上記上方の
外輪９の外端面よりも、上記複列転がり軸受１５の幅方
向に関して中央側に位置する。この為、上述の様に固定
したシール部材１４ｂの内径側部分が、上記上方の内輪
１１の外端面と干渉する事はない。尚、本例の場合、上
記シール部材１４ｂの接着固定を行なう為の接着剤１８
も、予め、このシール部材１４ｂの片側面の外周縁部分
で、上記上方の外輪９の外端面と対向する部分（図４の
斜格子で示した部分）に塗布している。この場合も、上
記接着剤１８は、上記シール部材１４ｂの片側面に塗布
する代わりに、上記上方の外輪９の外端面に塗布してお
いても良い。又、本例の場合、上記複列転がり軸受１５
を構成する外輪９、９は、後述する実施の形態の第３例
（図７参照）の様に、一体形成する事もできる。On the other hand, the seal member 14b for closing the upper end opening of the space is formed in an annular shape by the film material 19. Such a sealing member 14b is also provided with the outer peripheral edge of one side surface (the lower side surface in FIGS. 1 and 2) adhered and fixed to the outer end surface of the upper outer ring 9 (the upper end surface in FIGS. 1 and 2). The top opening is closed. Further, in this state, the inner diameter side portion of the seal member 14b is overlapped with the outer diameter side portion of the upper inner ring 11 in the axial direction. As described above, the outer end surface of the upper inner ring 11 is also located closer to the center in the width direction of the double row rolling bearing 15 than the outer end surface of the upper outer ring 9. For this reason, the inner diameter side portion of the seal member 14b fixed as described above does not interfere with the outer end surface of the upper inner ring 11. In the case of this example, an adhesive 18 for bonding and fixing the seal member 14b is used.
Also, in advance, the outer peripheral edge portion of one side surface of the seal member 14b is applied to a portion facing the outer end surface of the upper outer ring 9 (a portion indicated by a diagonal lattice in FIG. 4). Also in this case, the adhesive 18 may be applied to the outer end surface of the upper outer ring 9 instead of being applied to one side surface of the seal member 14b. In the case of this example, the double row rolling bearing 15 is used.
Can be integrally formed as in a third example of an embodiment described later (see FIG. 7).
【００１７】上述の様に構成する薄型モータ１をＨＤＤ
やＩＣ冷却用ファン等に組み付ける場合には、前記固定
部材２をハウジング等の固定部分に固定すると共に、ハ
ードディスクやファン等の回転駆動すべき部材を、上記
回転部材５に対し、直接又は他の部材を介して支持又は
固定する。The thin motor 1 constructed as described above is mounted on an HDD
When assembling to a cooling fan or the like, the fixing member 2 is fixed to a fixed portion such as a housing, and a member to be rotationally driven such as a hard disk or a fan is directly or other It is supported or fixed via a member.
【００１８】上述の様に構成する本例のシール部材１４
ａ、１４ｂと転がり軸受４、４と薄型モータ１の場合、
これら各シール部材１４ａ、１４ｂをこれら各転がり軸
受４、４に組み付ける際には、これら各シール部材１４
ａ、１４ｂの片側面外周縁部分を、上記各外輪９、９の
外端面に接着固定する。従って、上記各転がり軸受４、
４の軸方向寸法を十分に小さくする事に伴い、上記外輪
９、９及び上記内輪１１、１１の外端面と前記複数個の
玉１２、１２の転動面との軸方向に関する距離が短くな
った場合でも、上記各転がり軸受４、４に対して上記各
シール部材１４ａ、１４ｂを容易に組み付ける事ができ
る。尚、本例の場合、上記各シール部材１４ａ、１４ｂ
は、軸方向の厚さ寸法が非常に小さい（例えば、数十〜
数百μｍ）、フイルム材１９により形成している。この
為、上述の様に各シール部材１４ａ、１４ｂを上記各外
輪９、９の外端面に固定した場合でも、上記転がり軸受
４、４、並びにこれら転がり軸受４、４を組み込んだ薄
型モータ１の軸方向寸法が嵩む事はない。The seal member 14 of the present embodiment constructed as described above.
a, 14b, the rolling bearings 4, 4 and the thin motor 1
When assembling these sealing members 14a and 14b to the rolling bearings 4 and 4,
The outer peripheral edge portions on one side surface of a, 14b are bonded and fixed to the outer end surfaces of the outer rings 9, 9, respectively. Therefore, each of the rolling bearings 4,
Along with making the axial dimension of 4 sufficiently small, the axial distance between the outer end surfaces of the outer rings 9 and 9 and the inner rings 11 and the rolling surfaces of the plurality of balls 12 becomes shorter. In this case, the seal members 14a and 14b can be easily assembled to the rolling bearings 4 and 4. In the case of this example, each of the above-mentioned sealing members 14a, 14b
Has a very small thickness in the axial direction (for example, several tens to
(Several hundred μm), made of a film material 19. Therefore, even when the seal members 14a and 14b are fixed to the outer end surfaces of the outer races 9 and 9 as described above, the rolling bearings 4 and 4 and the thin motor 1 incorporating the rolling bearings 4 and 4 can be used. The axial dimension does not increase.
【００１９】又、本例の場合、上記各シール部材１４
ａ、１４ｂとして、これら各シール部材１４ａ、１４ｂ
の片側面の外周縁部分に接着剤１８、１８を塗布したも
のを使用している。この為、これら各シール部材１４
ａ、１４ｂの取り扱い性を良好にでき、これら各シール
部材１４ａ、１４ｂの組み付け作業の容易化を図れる。
尚、本例の場合、上記接着剤１８、１８を塗布する位置
を、上記各シール部材１４ａ、１４ｂの片側面のうち、
上記各外輪９、９の外端面と対向する部分に限定してい
る。この為、仮に上記各シール部材１４ａ、１４ｂが撓
んで、これら各シール部材１４ａ、１４ｂの内径側部分
が上記各内輪１１、１１の外端面、或は前記回転軸３の
基端面と接触（摺接）した場合でも、この接触した部分
に上記接着剤１８、１８が付着する事はない。従って、
この様に接触した場合でも、上記各シール部材１４ａ、
１４ｂを組み付けた転がり軸受４、４、並びにこれら転
がり軸受４、４を組み込んだ薄型モータ１の回転抵抗が
過度に上昇する事はない。In the case of the present embodiment, each of the sealing members 14
a, 14b, these sealing members 14a, 14b
Adhesives 18, 18 are applied to the outer peripheral edge portion on one side of the above. Therefore, each of these sealing members 14
a, 14b can be easily handled, and the assembling work of these seal members 14a, 14b can be facilitated.
In the case of the present example, the position where the adhesive 18 is applied is set at one of the side surfaces of the seal members 14a and 14b.
The outer ring 9 is limited to a portion facing the outer end surface of the outer ring 9. As a result, the seal members 14a and 14b are bent, and the inner diameter side portions of the seal members 14a and 14b are brought into contact with the outer end surfaces of the inner rings 11 or the base end surface of the rotating shaft 3 (sliding). Even if the contact is made, the adhesive 18 does not adhere to the contacted portion. Therefore,
Even in the case of such contact, each of the seal members 14a,
The rolling resistance of the rolling bearings 4 and 4 incorporating the rolling bearings 14b and the thin motor 1 incorporating the rolling bearings 4 and 4 are not excessively increased.
【００２０】又、本例の場合、上記各シール部材１４
ａ、１４ｂを構成するフイルム材１９は、ガスバリア性
等の異物遮断性能が良好であると共に、熱、湿度、更に
は経時による性能変化が非常に小さい。この為、前記各
玉１２、１２設置部の防錆や、これら各１２、１２設置
部内に封入したグリースの劣化防止等に関して、良好な
シール性能を得られると共に、この良好なシール性能を
長期間に亙り維持できる。更に、上記接着剤１８、１８
として、粘着性を有するものを使用した場合でも、この
接着剤１８、１８が乾燥する事を有効に防止できる為、
この接着剤の粘着力（接着力）を長期間に亙り維持でき
る。In the case of this embodiment, each of the sealing members 14
The film material 19 constituting the films 14a and 14b has a good performance of blocking foreign substances such as gas barrier properties, and has a very small change in performance due to heat, humidity, and time. Therefore, with respect to the rust prevention of the balls 12, 12 installation portion and the prevention of deterioration of the grease sealed in the respective 12, 12 installation portions, a good sealing performance can be obtained. Can be maintained. Further, the adhesives 18, 18
Even if a sticky material is used, it is possible to effectively prevent the adhesives 18 and 18 from drying,
The adhesive strength (adhesive strength) of this adhesive can be maintained for a long period of time.
【００２１】次に、図６は、本発明の実施の形態の第２
例を示している。本例の場合、複数個の玉１２、１２を
設置した空間の両端開口を塞ぐシール部材１４ｃ、１４
ｃを、それぞれ円輪状に形成している。又、これら各シ
ール部材１４ｃ、１４ｃの内径寸法を、１対の転がり軸
受４、４を構成する内輪１１、１１の外径寸法よりも僅
かに大きくしている。言い換えれば、本例の場合、図示
の組み付け状態で上記各シール部材１４ｃ、１４ｃの内
径側部分を、上記各内輪１１、１１の一部に軸方向に亙
り重畳させていない。これに伴い、本例の場合には、上
記各内輪１１、１１の外端面を、上記各シール部材１４
ｃ、１４ｃを支持固定する各外輪９、９の外端面と同一
平面上に配置している。その他の構成及び作用は、上述
した第１例の場合と同様である。FIG. 6 shows a second embodiment of the present invention.
An example is shown. In the case of this example, the sealing members 14c and 14 that close the openings at both ends of the space in which the plurality of balls 12 and 12 are installed.
c are each formed in a ring shape. Further, the inner diameter of each of the seal members 14c, 14c is slightly larger than the outer diameter of the inner rings 11, 11 constituting the pair of rolling bearings 4, 4. In other words, in the case of the present example, the inner diameter side portions of the respective seal members 14c, 14c are not overlapped with a part of the respective inner rings 11, 11 in the axial direction in the illustrated assembled state. Accordingly, in the case of this example, the outer end surfaces of the inner rings 11 and 11
c, 14c are arranged on the same plane as the outer end surfaces of the outer rings 9, 9 for supporting and fixing. Other configurations and operations are the same as those of the above-described first example.
【００２２】次に、図７は、本発明の実施の形態の第３
例を示している。本例の場合、複列転がり軸受１５ａを
構成する、複列の外輪軌道８、８を、単一の外輪９ａの
内周面に設けている。その他の構成及び作用は、上述し
た第２例の場合と同様である。FIG. 7 shows a third embodiment of the present invention.
An example is shown. In the case of the present example, double-row outer ring raceways 8 constituting a double-row rolling bearing 15a are provided on the inner peripheral surface of a single outer ring 9a. Other configurations and operations are the same as those of the above-described second example.
【００２３】次に、図８は、シール部材の別例を示して
いる。本例のシール部材１４ｄは、円形、円輪形等の所
定の形状としたフィルム材１９の片側面で、少なくとも
上記シール部材１４ｄを支持固定する為の軌道輪（外輪
又は内輪）の軸方向端面と対向する部分に、ポリエチレ
ンフィルム等の接着用フィルム２０を、ラミネートして
いる。この様なシール部材１４ｄを上記軌道輪に固定す
る場合には、上記接着用フィルム２０の表面を上記軌道
輪の軸方向端面に全周に亙り密接させた状態で、この接
着用フィルム２０を加熱する。これにより、この接着用
フィルム２０のうち上記密接させた部分を溶かして、上
記シール部材１４ｄを上記軌道輪の軸方向端面に溶着固
定する。本明細書では、この様な溶着等の接着剤を使用
しない接着方法も、接着の一種に含める。FIG. 8 shows another example of the seal member. The seal member 14d of the present example is formed on one side surface of a film member 19 having a predetermined shape such as a circular shape or a circular ring shape, and at least an axial end surface of a track ring (outer ring or inner ring) for supporting and fixing the seal member 14d. An adhesive film 20 such as a polyethylene film is laminated on the opposing portion. When such a sealing member 14d is fixed to the bearing ring, the bonding film 20 is heated while the surface of the bonding film 20 is in close contact with the axial end surface of the bearing ring over the entire circumference. I do. As a result, the closely contacted portion of the adhesive film 20 is melted, and the seal member 14d is welded and fixed to the axial end surface of the bearing ring. In the present specification, such a bonding method that does not use an adhesive such as welding is also included as one type of bonding.
【００２４】尚、上述した実施の形態では、薄型モータ
１として、固定部材２に対して回転軸３を、複列転がり
軸受１５、１５ａにより回転自在に支持する構造を示し
たが、本発明の薄型モータとしては、固定部材に固定し
た固定軸の周囲に回転部材を、転がり軸受により回転自
在に支持する構造を採用する事もできる。In the above-described embodiment, the thin motor 1 has a structure in which the rotating shaft 3 is rotatably supported on the fixed member 2 by the double-row rolling bearings 15 and 15a. As the thin motor, a structure in which a rotating member is rotatably supported by a rolling bearing around a fixed shaft fixed to the fixed member may be employed.
【００２５】[0025]
【発明の効果】本発明のシール部材と転がり軸受と薄型
モータは、以上の様に述べた通り構成され作用する為、
転がり軸受並びにこの転がり軸受を組み込んだ薄型モー
タの軸方向寸法を十分に小さくした場合でも、上記転が
り軸受に対してシール部材を容易に組み付ける事ができ
る。これと共に、このシール部材によるシール性能を良
好にできる。The seal member, the rolling bearing and the thin motor according to the present invention are constructed and operated as described above.
Even when the axial dimensions of the rolling bearing and the thin motor incorporating the rolling bearing are sufficiently reduced, the seal member can be easily assembled to the rolling bearing. At the same time, the sealing performance of the sealing member can be improved.
【図１】本発明の実施の形態の第１例を示す薄型モータ
の断面図。FIG. 1 is a sectional view of a thin motor showing a first example of an embodiment of the present invention.
【図２】１対の転がり軸受及び回転軸のみを取り出して
示す拡大断面図。FIG. 2 is an enlarged cross-sectional view showing only a pair of rolling bearings and a rotating shaft.
【図３】図１〜２の下方のシール部材の側面図。FIG. 3 is a side view of the lower seal member of FIGS.
【図４】同じく、上方のシール部材の側面図。FIG. 4 is a side view of the upper sealing member.
【図５】図３のＡ−Ａ拡大断面図、及び図４のＢ−Ｂ拡
大断面図。5 is an enlarged sectional view taken along line AA of FIG. 3 and an enlarged sectional view taken along line BB of FIG. 4;
【図６】本発明の実施の形態の第２例を示す、図２と同
様の図。FIG. 6 is a view similar to FIG. 2, showing a second example of the embodiment of the present invention;
【図７】同第３例を示す、図２と同様の図。FIG. 7 is a view similar to FIG. 2, showing the third example.
【図８】シール部材の別例を示す、図５と同様の図。FIG. 8 is a view similar to FIG. 5, showing another example of the seal member.
１ 薄型モータ ２ 固定部材 ３ 回転軸 ４ 転がり軸受 ５ 回転部材 ６ ステータ ７ ロータ ８ 外輪軌道 ９、９ａ 外輪 １０ 内輪軌道 １１ 内輪 １２ 玉 １３ スぺーサ １４ａ、１４ｂ、１４ｃ シール部材 １５、１５ａ 複列転がり軸受 １６ 芯材 １７ 蒸着膜 １８ 接着剤 １９ フイルム材 ２０ 接着用フィルム DESCRIPTION OF SYMBOLS 1 Thin motor 2 Fixed member 3 Rotating shaft 4 Rolling bearing 5 Rotating member 6 Stator 7 Rotor 8 Outer ring track 9, 9a Outer ring 10 Inner ring track 11 Inner ring 12 Ball 13 Spacer 14a, 14b, 14c Sealing member 15, 15a Double row rolling Bearing 16 Core material 17 Evaporated film 18 Adhesive 19 Film material 20 Adhesive film
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3J016 AA01 AA06 BA02 BB12 BB17 CA01 CA03 3J101 AA02 AA42 AA43 AA54 AA62 AA81 BA73 EA14 EA31 EA32 EA42 EA78 FA53 GA24 GA53 5H607 AA05 AA06 CC01 DD01 DD02 DD03 GG01 GG08 JJ04 JJ10 KK07 KK10 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 3J016 AA01 AA06 BA02 BB12 BB17 CA01 CA03 3J101 AA02 AA42 AA43 AA54 AA62 AA81 BA73 EA14 EA31 EA32 EA42 EA78 FA53 GA24 GA53 5H607 AA05 AA06 CC01 DD01 GG10 GG01 GG01
Claims (3)
輪の外周面との間に存在する複数個の転動体を設置した
空間の端部開口のうちの少なくとも一部を塞いだ状態
で、上記外輪と上記内輪とのうちの一方の軌道輪に固定
するシール部材に於いて、フイルム状の芯材の少なくと
も一方の側面にアルミニウム若しくはアルミナ製の皮膜
を形成したフイルム材を、上記端部開口の少なくとも一
部を塞ぐ形状として成り、その片側面の一部を上記一方
の軌道輪の軸方向端面に接着固定した状態で使用される
事を特徴とするシール部材。1. A state in which at least a part of an end opening of a space in which a plurality of rolling elements existing between an inner peripheral surface of an outer ring and an outer peripheral surface of an inner ring constituting a rolling bearing is closed. A sealing member fixed to one of the outer race and the inner race, wherein a film material in which a film made of aluminum or alumina is formed on at least one side surface of a film-shaped core material is attached to the end portion. A seal member having a shape that covers at least a part of an opening, and is used in a state where a part of one side surface is adhered and fixed to an axial end surface of the one orbit ring.
面に内輪軌道を有する内輪と、これら外輪軌道と内輪軌
道との間に設けた複数個の転動体と、上記外輪の内周面
と上記内輪の外周面との間で上記複数個の転動体を設置
した空間の端部開口を塞ぐシール部材とを備えた転がり
軸受に於いて、このシール部材が請求項１に記載したシ
ール部材であり、このシール部材の片側面の一部を、上
記外輪と上記内輪とのうちの一方の軌道輪の軸方向端面
に接着固定した事を特徴とする転がり軸受。2. An outer ring having an outer raceway on an inner peripheral surface, an inner racer having an inner raceway on an outer peripheral surface, a plurality of rolling elements provided between the outer raceway and the inner raceway, and an inner periphery of the outer raceway. A sealing member for closing an end opening of a space in which the plurality of rolling elements are installed between a surface and an outer peripheral surface of the inner ring, wherein the sealing member is a seal according to claim 1. A rolling bearing, characterized in that a part of one side surface of the seal member is bonded and fixed to an axial end surface of one of the outer ring and the inner ring.
このステータに対向させたロータを支持固定した第二の
部材とを、転がり軸受により互いに相対回転自在に組み
合わせて成り、上記ロータの外径寸法が、モータ全体と
しての軸方向寸法の７倍以上である薄型モータに於い
て、上記転がり軸受が請求項２に記載した転がり軸受で
ある事を特徴とする薄型モータ。3. A first member supporting and fixing a stator,
A second member supporting and fixing the rotor opposed to the stator is rotatably combined with each other by a rolling bearing. The outer diameter of the rotor is at least 7 times the axial dimension of the entire motor. A thin motor, wherein the rolling bearing is the rolling bearing according to claim 2.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000024371A JP2001214940A (en) | 2000-02-01 | 2000-02-01 | Sealing member, roller bearing, and thin-type motor |
| US09/774,576 US7031106B2 (en) | 2000-02-01 | 2001-02-01 | Sealing member, rolling bearing, thin motor, and bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000024371A JP2001214940A (en) | 2000-02-01 | 2000-02-01 | Sealing member, roller bearing, and thin-type motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001214940A true JP2001214940A (en) | 2001-08-10 |
Family
ID=18550376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000024371A Pending JP2001214940A (en) | 2000-02-01 | 2000-02-01 | Sealing member, roller bearing, and thin-type motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001214940A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016170850A (en) * | 2015-03-13 | 2016-09-23 | 日本電産株式会社 | Spindle motor and disk drive apparatus |
-
2000
- 2000-02-01 JP JP2000024371A patent/JP2001214940A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016170850A (en) * | 2015-03-13 | 2016-09-23 | 日本電産株式会社 | Spindle motor and disk drive apparatus |
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